US1475476A - Island - Google Patents

Description

Nov. 27, 1923 1,475,476

- E. M. EK

HARNESS MOTION FOR LOOMS Filed Jan. 15. 1921 6 Sheets-Sheet 1 Nov. 27, 1923 1,475,476 I E. M. EK

HARNESS MOTION FOR LOOMS Filed Jan. 15. 1921 e Sheets-Sheet 2 Nov. 27, 1923- HARNESS MOTION FOR LOOMS Fild Jan. 15, 1921 6 Sheets-Sheet 5 Nov. 27, 1923 E. M. EK

HARNESS MOTION FOR LOOMS Filed Jan. 15. 1921 6 Sheets-Sheet 4 ZQW a; ,gg

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Nov. 27, 1923 EM. EK

HARNESS MOTION FOR LOOMa Filed Jan. 15 1921 6 Sheets-Sheet 5 Nov. 2 ,1923 1,475,476

E. M. EK

HARNESS MOTION FOR LOOMS Filed Jan. 15. 1921 6 Sheets-Sheet 6 Patented Nov. 27, 1923.

UNITEDSTATES I EDWARD M. EK, OE PROVIDENCE, RHODE ISLAND.

HARNESS MOTION FOR LOOMS.

Application filed January 15, 1921. Serial No. 437,410.

To all whom it may concern:

Be it known that I, EDWARD M. En,- a citizen of the United States, residing at Providence, in the county of Providence, State of Rhode Island, have invented certain new and useful Improvements in Harness Motions for Looms, of which the following is a specification.

My invention relates to improvements in harness-motions for looms.

he principal object of the invention is to provide means for operating the harnesses without the use of springs or spring-jacks whereby to economize power and reduce the :7 strain on the harness-frames.

By eliminating excessive strain on the harness-frames the latter may be constructed of lighter and thinner stock andhence an increased number of harnesses may be used in the available space.

Another object of the invention isto provide a simple and compact pattern-mechanism for controlling the shifting of the harnesses in accordance with a predetermined order.

Another object of the invention is to pro vide a wide range of control for a considerable number of harnesses in order to secure a maximum number of pattern variations.

.io Further objects of the improvement are set forth in the following specification which describes a preferred embodiment of the invention as illustrated by the accompanying drawings. In the drawings:

as Fig. 1 is an end elevation of a well-known type of broad-loom showing-my improved harness-motion applied thereto;

' Fig. 2, a front view of the loom frame showing the method of suspending the barness-frames therein and connecting them with their actuating-means;

Fig. 3, an enlarged view of the sidebrackets for supporting the harness-motion from the main frame of the loom, and also illustrating the arrangement-of the patternroll or cylinder and its operating-mechanism;

Fig. i, a similar view showing the detail of the selector-mechanism operated from the patternchain to control the shifting of the harnesses;

Fig. 5, a detail view of the selector-lever and the clutch-pawl or shifter-bar lock oper ated therefrom;

Fig. 6, a detail view of the detent-means for lrolding the clutch-pawl in its different positions; I

F 1g.'7 a detail View of the locking-mechanism for the selector-levers and the means for operating the same;

Fig. 8, a view showing the grouped shifterbars and their actuating-levers; and

Fig. 9, a detail view of the operatingmechanism for the actuating-levers.

Referring first to Fig. 1 of the drawings, F designates the main frame of the loom; B the breast-beam at the front thereof; and L the lay carried by the oscillating arms 1. The warp-beam VJ is supported at the rear of the loom; the take-up or winding-on roll R at the front, below the breast-beam B; and C indicates the cloth being wound thereon. The crank-shaft S extends transversely across the frame F and is driven from suitable poWer-devices, not herein shown, to reciprocate the lay L by means of the pitmen P connected to the cranks. On the outer end of the crank-shaft S is the usual handwheel G for turning the loom over by hand.

Referring now to Figs. 3 and 4, a plate or brace 2 is bolted to the central portion of one of the sides of the loom frame F, and reaching forwardly and upwardly therefrom is an elbow-shaped arm 3, see also Fig. 1. At the upper end of the arm 3 is a rectangular pad 4 which is slotted on its side to receive a plate 5 bolted thereto, see Fig. 8. The plate 5 serves as a support for a pair of levers 6 and 7 which are pivoted thereon by means of bolts 8 to adapt them to be oscillated from the crank-shaft S of the loom to transmit motion to the shifter-bars 10 which actuate the harnesses H.

Referring to Figs. 8 and 9, the actuatinglevers 6 and 7 for the shifter-bars 10 are operated from two oppositelymoving rocker-shafts 11 and 12 which receive their motion from the crank-shaft S. The shafts 11 and 12 are journaled in a bearing 13 on an arm 14: extending rearwardly from the plate or brace 2; the shaft 11 being hollow or tubular in cross-section with its companion shaft 12 arranged concentrically therein. Mounted on the inner end of the hollow shaft 11 is a rocker-arm 15 secured rotatively therewith by a pin 17 and a sec ond rocker-arm 16 is similarly secured to the end of the interior shaft 12 which pro jects beyond the end of the shaft 11. Pivoted to the outer ends of the rocker- arms 15 and 16 by means of bolts 18 are two links or connecting-rods 19 which are likewise pivotally connected at 20 to the actuating-levers 6 and 7. The tubular shaft 11 carries another rocker-arm 21 on its outer end, see Fig. 9, the hub of said arm being split and clamped to the shaft by means of a binder-screw 23. Outwardly beyond the arm 21 is a fourth rocker-arm 22 secured fast by means of a pin 24 to the interior shaft 12 which projects beyond the end of the shaft 11. The. arms 21 and 22 are connected to be rocked in opposite directions from a pair. of oscillating cam levers 25 and 26.

The cam- levers 25 and 26 are pivoted on a stud 27, which projects from a plate 28 fastened to the side of the loom-frame F, and. are formed near their upper ends with ringashaped enlargements 29 surrounding the crank-shaft S. The rings 29 are formed with inwardly-projecting ears 30 carrying studs 31 on which are journaled suitable cam-rolls or bowls 32. Each of the cam- ] evers 25 and 26 carries a pair of rolls 32 disposed in diametrically opposite relation to the axis of the crank-shaft S. Rotatively secured to the crank-shaft S are two cams 35 and 36 arranged in offset relation to the axis of the shaft. The peripheries of the cams 35 and 36 are formed with opposite concentric faces 37 and 38 and opposite eccentric faces 39 and 40 adapted to engage with the rolls 32 on the levers 25 and 26. As the cams 35 and 36 are rotated with the crank-shaft S in the direction indicated by the arrow 00, Fig. 9, the levers 25 and 26 will be oscillated in alternately opposite directions with a dwell at the end of each stroke. The periphery of the cams is divided into four parts of substantially equal extent so that as the cams turn through a half revolution with the rolls 32 bearing on the concentric faces 37 and. 38 the levers 25 and 26 will remain at rest; While during the next half revolution the rolls 32 will ride on the eccentric faces 39 and 40 to rock the two levers in opposite directions. The cam- levers 25 and 26 are formed on their adjacentsides with projecting ribs 41 and 42 arranged concentric with their axis of oscillation and provided with bearing-faces which slide one against the other during the oscillation of the levers to steady them in their movement. At the upper ends of the levers 25 and 26 are slots 44 which are engaged by rollers 45 journaled on studs 46 projecting from the ends of the rockerarms 21 and 22. As the cam- levers 25 and 26 are oscillated from the cams 35 and 36 the rollers 45 slice in the slots 44 and in this manner motion is communicated to the rocker-arms 21 and 22 to oscillate the shafts l1 and 12 and the arms 15 and 16.

Referring now to Figs. 1 and 8, the shift er-bars 10 for the harness-frames H are sup ported in a sort of cage or frame-work K mounted at the sideof the loom above the plate 2. The frame K comprises two opposite brackets or uprights 48 fitted across the top of the plate 2, see Fig. 4, and connected by a cross-strut 49 bolted thereto. The crossstrut 49 is bolted or otherwise fastened to the plate 2 by suitable means not herein shown in detail. Extending horizontally between the brackets or uprights 48 are two pairs of upper and lower guide-bars 50 which are bolted to thebrackets at 51 and 52. The bars'50 of each pair are spaced apart in parallel relation and the shifterbars 10 are adapted to slide up and down between them. The actuating-levers 6 and 7 extend across the series of bars 10 and are held in place thereagainst by vertical guidestrips 47 fastened to the ends of the horizontal guide-bars 50. by the bolts 52. As shown in Figs. 4 and 8, each shifter bar 10 is constructed from two narrow strips of metal arranged in parallel, spaced relation and connected at their ends by cylindrical studs 53 secured to the strips by rivets 54. The shifter-bars 10 are held in spaced-apart relation in the cage or frame K and guided in their movement by means of a series of suitable cross-pins 55 extending between the guide-bars 50. Connected to the studs 53 at the ends of the shiftenbars 10 are cords or wires 56 and 57 leading to the harness frames H, see Fig. 2. The cords 56 from the upper ends of the shifter-bars lead over sheaves or pulleys 58 and 59 supported on the arch-members 60 of the loom. Referring to Figs. 1 and 2, the two arches 60 are bolted to the top of the brackets or uprights 48 on one side of the loom and supported from the main frame F at the opposite side. The sheaves 58 are journaled on rods or shafts 61, extending between brackets 62 fastened to the arches 60, while the sheaves 59 of the other set are journaled on rods 63 extending between the arches. The number of sheaves employed in each set corresponds to the number of harnesses .to be used in the loom and the adjacent sheaves in each series are held in place on their rods by suitable collars 64 at the ends, see Fig. 1. The cords 57 from the lower ends of the shifterbars 10 lead down around guide-sheaves 65 supported from brackets 66 attached to the loom-frame F, see Figs. 1 and 2, and thence pass around sheaves 67 carried by brackets 68 attached to the lower cross-strut 69. The harness-frames H are constructed with the usual cross-members h, h to which the ends of the wires or cords 56 and 57 are fastened, and extending between the cross-members are the wire heddles h of well-known ar-- cated up-and-down intheir guideways the respective harness-frames connected thereto will be raised and lowered therefrom.

The shifter-bars 10 are adapted to be connected at intervals with their actuatinglevcrs 6 and 7 by means of a selector-mechanism arranged as next described. Referring to Fig. 4, each shifter-bar 10 carries a rockable clutch-pawl disposed between its side-strips and pivoted on a cross-pin 71 located at a point midway of its ends. The pawl 70 is formed at top and bottom with undercut hook-like projections or toes 72 and 73 which are adapted to engage respectively with the beveled edges of the upper and lower actuating-levers 6 and 7.

Referring to Figs. 4 and 5, when the pawl 70 is rocked forward at the top its toe 72 will be carried into position to hook over the upper edge of the lever 6; and when it is rocked in the opposite direction its lower toe 73 will be thrown into position to engage the under edge of the lever 7. It will ,be noted from Fig. 4 that the shifter-bars 10 are'each formed with a projection 74 at the center, see also Fig. 8, which is undercut at top and bottom to adapt it to hook across the lower beveled edge of the actuating-lever 6 and the upper edge of the lever 7. It will thus be seen that when the pawl 70 is rocked forward at the top, as shown in Fig. 5, it will clutch the lever 6 between its toe 72 and the projection 74; while with the pawl rocked forward at the bottom the toe 78 will cooperate with the projection 74 to lock the lower lever 7 to the shifterhar 10.

Referring to Fig. 4, the pawls 70 are operated from a series of selector-levers 75 arranged in alinement opposite the row of shifter-bars 10 and controlled from a pattern-chain D of usual type. The'several le-' vers 75 are pivoted on a horizontal shaft 76 carried by a pair of rockable arms 77 arranged outside the brackets or uprights 48. The rocker-arms 77 are secured to a lower cross-shaft 78, see Fig. 4, which is journaled in bearings in the brackets 48. The cross-shaft 76 extends between the upper extremities of the arms 77, its ends being secured therein by set-screws 80, and passing through. suitable slots 81 in the brackets 48 to permitthe shaft to move back and forth with the arms. The rocker-arms 77 are oscillated from a cam 82 whereby to carry the selector-levers 75 toward the pawls 70 to shift the latter and to then withdraw the levers away therefrom. The cam 82 is fast on a shaft 84 which is driven from the crankshaft S through a train ofgearing shown in Fig. 1. On the end of the crankshaft S is a bevel-gear 85 which meshes with a gear 86 on the lower end of an inclined shaft 87. The lower end of the shaft 87 is journaled in a bearing 88 swiveled on the crank-shaft S, while its upper end turns in a bearing 89 attached to one of the brackets or uprights 48. At the upper end of r the shaft 87 is a bevel-gear 90 meshing with a corresponding gear 91 on the outer end of the cam-shaft 84. Referring to Fig. 4, the cam 82 is of double-contour type having a main cylindrical portion 92 with a cut-out 93 in its periphery, and a smaller cylindrical hub 94 witha star-point 95 arranged diametrically opposite the cut-out. On one side of the rocker-arm 77 is a curved finger 97 carrying a roller or bowl 98 which travels on the main cylinder 92 of the cam; while a second bowl 99 carried at the upper end of the arm 77 is adapted to travel over the smaller contour of the cam. The cam 82 is rotated in the direction indicated by the arrow 6, Fig. 4. and normally, as the opposite rollers 98 and 99 travel on the cylindrical portions of the cam, the rocker-arm 77 will remain at rest. When, however. the point or projection 95 of the cam comes into action on the roll 99 of the rocker-arm the latter will be rocked in the direction indicated by the arrow 0, Fig. 4, and then returned to first position again with a quick action. As before stated, the rocker-arm 77 and its opposite companion arm carry the shaft 76 on which the selector-levers 7 5 are mounted and as the two arms are rocked inwardly toward the shifter-bars 10 the levers are carried into position to actuate the clutch-pawls 70 in the manner as hereinafter more fully explained.

The forward ends of the selector-levers 7 5 are of fork-shape with upper and lower fingers or projections 1.00 and 101 rounded off at their ends and adapted to engage the edges of the pawls 70. To insure that the ends of the levers 75 may engage properly with the appropriate pawls 70 operated therefrom the forked portions of the levers are held in a comb-like rack or grating J. The grating J consists of upper and lower parallel bars 103 extending horizontally between the brackets 48 and attached thereto by suitable sockets 104. Held in spaced relation along thebars 103 are vertical teeth or tines 105 constructed of relatively thin strips of metal which are arranged between the adjacent levers 75 of the series to space them apart and maintain them in opposite alinement with their respective pawls 70. A comb or rack O is also provided for the same purpose at the outer ends of the levers 75. As shown in Fig. 4, the comb 0 consists of a row of vertical pins 107 supported on a bar 108 extending betwen the brackets 48.

As shown in Figs. 4 and 5, the upper finger 100 of each selector-lever 7 5 strikes against the rounded rearward edge of its opposite pawl 70 to rock the upper end of the pawl forward, and the lower end of the pawl is cut away with a notch 106 to provide clearance for the lower projection 101 one arcuate face 150 and then the other 151 on the forked end of the lever 148 pivoted at 153 to thebracl-zet 48. At the ends of the arcuate faces150 and 151 are beveled faces 152 across which the inclined sides of the cam ride to impart a smooth, easy rocking motion to the lever 148. Projecting from a lug at the top of the forked end of the lever 148 is a stud or pin 154 which engages a slot 155 in the arm 145. As the lever 148 is raised and lowered with a relatively slow movement its pin. 154 will cause a corresponding rise and fall in the arm 145. As the arm 145 is drawn down it will rock the link 146 at its end in the direction indicated by the arrow (2, Fig. 7, and hence the arm will be drawn inwardly in the direction indicated by the arrow 7, Fig. 7. It will be understood that the arm 145 is arranged opposite to a similar. arm which is operated in the same manner from another cam and linkmotion as above described.

It has been explained that the two arms 145 carry the locking-bar or rod 143 at their ends and the bar is moved by and with the arms to carry it into locking-engagement with the selector-levers 75. As the links 146 draw the arms inwardly the bar or rod- 143 is engaged with the notches 142 in the ends of the uptilted levers 75, see Fig. 4, and it will also be noted that the bar 143 is carried into position across the top of the levers which are depressed. That is to say, the bar 143 not only locks the several levers 75 whose notches it engages but it also holds down the other series of depressed levers to prevent them from tilting or moving out of place. When the shaft 76 carries the levers forward, due to the rocking motion of the arms 77, the links 146 pivoted on the shaft will draw the bar 145 forward with the levers and hence the latter will be held positively in their selective relation throughout their operative stroke. As thelevers 75 are carried back again away from the pawls 70 the cams 147 act to liftthe fork-levers 148 and the latter raise the arms 145 to swing their links above the shaft 76 so that the rod or bar143 is carried back to release the levers 7-5 to allow them to be shifted in position once more as required.

Having now described the construction and arrangement of my improved device in detail its method of operation will next be explained. The crank-shaft S is driven from any suitable source of power and the pitman P are reciprocated thereby to oscillate the lay L back and forth in the usual manner. shaft S turns in the direction indicated by the arrow a; and the cams'35 and 36', being fast thereon, are rotated therewith to oscilapart.

Referring to Fig. 9, thecam late the levers 25 and 26 back and forth across center with aslight dwell at the end of each stroke. The cams are so timed in re lation to the cranks on the shaft S that the levers 25 and 26 oscillate past each other across center both during the forward and rearward stroke of the lay, or in other words,

the levers are reversed in position once asthe lay moves forward and again as it moves back. As the cam- levers 25 and 26 are rocked back and forth in this manner the rocker-arms 21 and 22 are operated therefrom and likewise moved across center, as indicated by the arrows 7 and 2 in Fig. 9, to reverse their positions. The rocker-arm 21 is fast on the tubular shaft 11 and hence it will oscillate this shaft to rock the lever 15 in the same direction, as indicated by the arrow '2: in Fig. 9; while the arm 22 fast on the shaft 12 will act therethrough to rock the arm 16 in the opposite direction as indicated by the arrow w in Fig. 8. The rocker- arms 15 and 16 are .connected respectively with the actuating levers 7 and 6 which reciprocate the shifter-bars 10 and the method of operation of these levers is as follows: Referring to Fig. 8, this view shows the levers 6 and 7 in horizontal position in parallel relation. Now as the rocker-arm 15 is rocked downward, as indicated by the arrow 4), the lever 7 will be drawn down by its link 19 connectedthereto; while as the arm 16 is rocked upward at the same time the lever 6 will be raised by its link 19 connected therewith. In this manner the actuating lever 6 is raised and the lever 7 depressed at each half rotation of the crank-shaft S. see dotted lines in Fig. 8; while at the next half rotation of the crank-shaft the levers are carried toward each other into horizontal position as illus been explained that the cam- levers 25 and 26, see Fig. 9, are reversed in position at each stroke of the lay L and it will therefore be obvious that the actuatingdevers 6 and 7 must also be shifted during both the forward and rearward stroke of the lay. The arrangement of the cams 35 and 36 in relation to the cranks of the'shaft S is such that as thelay L moves forward the two levers 6 and 7 are swung toward'each other into neutral position: while as the lay moves backagain the levers 6 and 7 are swung As before stated, the cam- levers 25 and 26 have a dwell at the ends of their stroke during the period that the rollers 32 travel over the concentric portions 37 and 38 of the cams 35 and 36. see Fig. 9, and con- 7 in neutral position, as illustrated by the full lines in Fig. 8, the pause in their action occurs as the lay L approaches the forward end of its stroke-to beat the lastwoven pick of yarn into the fell of the cloth. During this period of rest the several shifter-bars 10 are all in opposite alinement in their mean position and at this point in the operation of the loom the selector-mechanism comes into action to shift "the order of cou pling the shifterdaars to the opposite actuating-levers 6 and 7.

-Ithas been explained that the pattern-roll 120 is driven intermittently from the camshaft 84 which receives its motion from the crank-shaft S through the trainof gearing 85, 86, 90, 91, shown in Fig. 1. The roll 120 is turned from the Geneva-motion N, see Fig. 3, through a sixth of a rotation at each pick of the loom, and at each-turn a new slat 126 in the pattern-chain D is brought into position beneath the outer arms of the selector-levers 75,'as shownin Fig. 4. The slats 126'carry the'lifter-pins 130 which, as before explained," are arranged in predetermined order therealong to correspond to pattern changes to be reproduced in the fabric. Asthe pins 130 rideup in under the levers 75 certain of the latter will be tilted levers 6 and 7 come to rest in neutral posi tion, as'shown by full lines in Fig. 8, the selector-levers 75 will' have been shifted in position and will be moving forward underthe action of the rocker-arms 77 carryi'ngthe shaft 76 on which the levers are mounted. It

has been explained that the arms 77 are rocked-from the cam 82, and during their forward movement the levers 75 are locked in' their predetermined correlation by the rod 143 engagingtheirrearward ends. The rod 143 is slid into engagement with the notches 142 at the ends of the uptilted levers 75 by the sliding action of the opposite arms 145' and also slides across the top of the de-' pressed lovers to 'lockall of the levers in place. The arms 145 receive their motion from the toggle-action of the links 146 at their inner ends, see Fig. 7, as'the levers 148 draw the arms downwhen rocked by the cams 147 in the manner as before explained. After the levers-75 have been locked inposi tionj'by the-rod 143 they start to move forward in the direction indicated by'the arrow f, Figs.4 and 7', and the rod 143 is carrie'd forward with them'by the arms 145 which, as'before stated', 'areconnectedto the As the actuating shaft 76. During the sliding movement of the arms 145 the rod '143 slides in the slots 144 and the pins 154 on the levers 148 slide in the slots 155, see Fig. 7.

As above stated, the selector-levers 75 come into action on the clutch-pawls while the shifter-bars 10 are at restin midposition. here a pawl 70 is rocked back at the top with its lower toe 73 hooked under the edge of the lower actuatinglever 7 if its respective selector-lever is lowered at the front then the upper finger 100 on the forked end of the lever will engage the edge of thepawl to rock its upper leg forward, as shown in Fig. 5. Stated briefly, the pawl 70'will be rocked forward at the top to release its lower toe 73 from the lever 7 and to hook itsupper toe 72 across the upper edge of the actuating-lever 6. On the other hand, where the pawl 70 is already engaged with the upper lever 6, then if its selector-lever 75 moves forward with its forked end depressed, as shown in Fig. 5, it will-have no effect on the pawl but will allow it to remain in looking engagement with the upper lever. When, however, the selector-lever 75 is shifted in position and its forked end elevated, if the pawl 70 is locked to the lever 6 then it will be rocked away therefrom and engaged with the lower lever 7. Referring to Fig. 4, one of the levers 75 is here shown with its forked end raised and the forward movement of the lever inthis position carries its lower projection 101 against the shoulder 111 on the pawl 70 to push it forward at the bottom whereby to carry its toe 73 across the lower edge of the lever 7 It has before been eX- plained that with the pawl 70 rocked forward at the top the actuating-lever 6 is clutched or locked between the toe 72 on the pawl and thefixed projection or abutment '74 on the shiftera'od 10; while with the pawl 70 in its opposite position the lower lever 7 is'gr'ipped betweenfthe bottom toe 73 of' the pawl and the abutment 74 on the shifter-rod.

It will thus be seen that each shifter-bar 10 is locked to one or the other of the actuating-leyers 6and' 7 in accordance with the'selectiveposition of its respective selector-lever 75. The relative positions of the selectordevers 75 is determined by the setting of the lifter-pins 130' on the patternchain D, as before explained, it being understood that the levers 75 drop back into first position under the action of gravity after the pins ride out from 'inunder their rearward arms. After the levers 75 have beencarried forward in unison to operate onthe oawls'70theyare immediately withdrawn again and the locking-bar143 is slid away from 'theirends to allow them to be individually shifted in position again by the turning movement of the "pattermchain D.

In some instances a selector-lever which is depressed may remain in this position during several forward movements so that the pawl operated therefrom will not be unlocked from the lower actuating-lever 7 and likewise one or more of the selector-levers may b sustained in raised position for a time by a series of lifter-pins 130 passing under its rearward arm so that any one or more of the pawls 70 may remain locked to the upper actuatinglever 6 through a certain cycle of operations.

The pawls 70 are held in locked relation with the actuating-levers 6 and 7 by the'enragei'nent of the detent-sprin gs 112 with their projections 116 and in this way the shifter-bars 10 are securely clutched to the levers 6 and 7 to be moved therewith. It has before been explained that each shifterbar' 10 is connected at top and bottom to oneot the harness-frames H by means of the wires 56 and 57, see Fig. 2, and hence when one of the shifter-bars is moved upwardly under the action of the lever 6 its respective frame H will be drawn down by the wires 5?; while, on the other hand, when one of the bars 10 is moved downwardly it will cause the wires 56 to raise the frame H connected thereto. It will be observed by reference to Fig. 8 that the shifter-bars 10 farthest away from the pivots 8 of the actuating-levers 6 and 7 will have the greatest rise and fall under the action of the levers and these bars are connected to the harnessframes farthest removed from the front of the loom. This provides that an increasing range of motion is imparted to the harnessframes as they progress rearwardly from the fell of the cloth so that all of the warpyarns controlled by the bank of harnesses will be shifted sufficiently to open the shed to the full extent required for proper weaving conditions. Moreover, the arrangement of the cam-mechanism which operates the actuating-levers 6 and 7 is such that the harnesses are held in raised and lowered position with a dwell so that the shed remains open for a long enough period to insure the free passage of the shuttle without danger of interference with the warp. The operation of the selector-levers takes place after each pick of the shuttle and the shifter-bars 10 are thus locked to the actuating-levers 6 and 7 in accordance with the prescribed sequence and order in which the harnessesa-re to be raised and lowered to reproduce the pattern in the fabric in accordance with the design laid out by the arrangement of the pins 130 on the patternchain D. After the pattern-mechanism has once been set the loom may be operated continuously to weave long lengths of fabric with the pattern repeated therein at regular intervals.

It will be observed from the above that my invention provides a particularly simple, compact and efficient mechanism for automatically operating the harness of the loom with apositive action, without backlash or lost motion. The operating parts of the mechanism are light in weight and arranged for easy action whereby to save power and reduce the friction and wear, while also eliminating much of the vibration resulting from the movement of the heavy jacks and levers as usually employed- By re ducing the strain on the harness-frames the latter may be made lighter and thinner whereby a much larger number of harnesses may be employed in the loom to allow for a wider range of pattern changes. The pattern-mechanism is particularly accurate and positive in action to insure uniform weaving without faults or blemishes in the cloth and the device is adapted to practically all types of looms and may be applied to looms already in use without material alteration in the general structure or readjustment of the parts thereof.

While I have herein shown and described a preferred embodiment of the device it is to be understood that various changes may be made in the structure and arrangement of the parts of the mechanism without departing from the spirit or scope of the invention; therefore, without limiting myself in this respect, I claim:

1. In a harness-motion for looms, the combination with a plurality of harness-frames, of a series of shifter-bars each connected with a harnessframe, a pair of oppositelymoving levers arranged adjacent the bars, a pawl pivoted on each shifter-bar to adapt it to rock into opposite positions to engage one or the other of the actuatingdevers, a series of forked selector-levers adapted to be shifted in position to engage at different points on the pawls, pattern-mechanism for controlling the position of the selectorlevers, and means to move the levers bodily into position to actuate the pawls with opposite effect thereon in accordance with the selective position to which said levers have been shifted.

2. In a harness-motion for looms, the com bin-ation with a plurality of harness-frames, of a series of shifter-bars each connected to a harness-frame, a pair of oppositely-moving actuating-levers. a pawl pivoted on each shifter-bar to adapt it to be rocked to engage one or the other of the actuating-levers, a series of selector-levers having lingers adapted to engage the opposite ends of the pawls, means forshifting the selector-levers to cause their opposite fingers to engage with first one and then the other end of their respective pawls, and means for bodily moving the levers into position to actuate the pawls.

3. In a harness-motion for looms, the combination with a plurality of harness-frames, of a series of shifter-members connected to raise and lower the several frames, oppositely-moving actuating-members for shifting the shifter-members, means for interch angeably connecting the individual shifterto lock the selector-members in their different operative positions.

4. In a harness-motion for looms, the combination with a plurality of harness-frames, of a series of shifter-members connected to raise and lower the several frames, oppo sitely-moving actuating-members for shifting the shaf-ter-members, means for inter changeably connecting the individual shiftermembers with the different actuating-memhers, a series of selector-members for selectively operating the connecting-means, means for shifting the selector-members into different positions to vary their operative effect on the connecting-means, means to move the selector-members bodily into position to engage with the connecting-means, and means slidable into engagement with the selector-members after they have been shifted to lock them in their operative re lation.

5. In a harness-motion for looms, the combination with a plurality of harness-frames,

of a series of shifter-members connected to raise and lower the several frames, oppositely-moving actuating-members for sifting the shifter-members, means for inter changeabl y connecting the individual. shiftermembers with the different actuating-memhers, a series of roe {able selector-levers for operating the connectingmeans, means to rock the selectordey ers into different positions to alter their operative effect on the connecting-means, means to carry the selector-levers forward to cause them to act on the connecting-means, means for locking the selector-levers in their operative relation, and means to carry said locking-means forward with the levers during the operative stroke thereof.

In testimony whereof I afiix my signature.

EDWARD M. EK.

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